Dynamic digitized cerebral parenchymography

Summary Aortic arch injections centred on the head have been performed routinely in patients with cerebral ischaemia. Digital angiograms with modified windowing (low and narrow) have been used. This cerebral arch injection allows much improved analysis of the cerebral parenchymal vascularization, giving better understanding of hemispheric ischaemia and making the decision about revascularization more rational.     

重组竹叶青蛇毒纤溶酶原激活剂TSV-PA体内溶栓效应观察

目的：观察重组竹叶青蛇毒纤溶酶原激活剂TSV—PA体内溶栓效应。方法：利用家兔制备的脑血栓模型，以生理盐水和尿激酶为对照，用数字减影血管造影技术观察重组竹叶青蛇毒纤溶酶原激活剂TSV—PA体内溶栓效果。结果：TSV—PA高剂量实验组(300μg/kg)再道时间为2h以内，TSV—PA低剂量实验组(150μg/kg)5h以内再通。尿激酶组(2000U／kg)再通时间为3—6h；24h以内生理盐水对照组没有观察到再通现象。实验动物45h后处死解剖，未观察到出血现象和其它异常现象。结论：重组TSV—PA在体内具有良好的溶栓活性。     

Surgery of basilar aneurysms associated with unexpected rupture of an internal carotid artery aneurysm

During a surgery of basilar aneurysms via the trans-sylvian approach, we encountered an arterial bleeding caused by rupture of an internal carotid artery aneurysm that had been difficult to diagnose before surgery, as it was a small and brood-neck aneurysm and mimicked arteriosclerosis. In spite of several surgical procedures, the surgical path at the basilar aneurysms became narrow, and we had to abandon the clipping of the aneurysms. Consideration of radiological and intraoperative findings was made for this case, demonstrating a pitfall that neurosurgeons may encounter during surgery. Received: 16 December 1998 / Accepted: 26 May 1999     

Multicentre analysis of treatment planning information: Technical requirements,possible applications and a proposal

Digital data from 3‐D treatment planning computers is generally used for patient planning and then never considered again. However, such data contains enormous quantities of information regarding patient geometries, tissue outlining, treatment approaches and dose distributions. Were such data accessible from planning systems from multiple manufacturers, there would be substantial opportunities for undertaking quality assurance of radiotherapy clinical trials, prospective assessment of trial outcomes and basic treatment planning research and development. The technicalities of data exchange between planning systems are outlined, and previous attempts at producing systems capable of viewing and/or manipulating imaging and radiotherapy digital data reviewed. Development of a software system for enhancing the quality of Australasian clinical trials is proposed.     

瞬态诱发耳声发射信号数字滤波及相关函数分析

用数字滤波及相关函数处理技术对１０名（２０耳）学龄前儿童短声诱发的ＴＥＯＡＥ信号进行二次处理。结果表明：通过数字滤波及相关处理后的ＴＥＯＡＥ信号比原始记录的ＴＥＯＡＥ信号波形更加清晰，易于辨认，有效地提高了ＴＥＯＡＥ信号的信噪比及识别率。     

复杂指蹼挛缩和皮肤缺损的显微外科重建

目的：研究复杂指蹼挛缩和缺损的显微外科重建技术。方法：应用７种岛状皮瓣和１０种游离皮瓣重建指蹼４４例，其中应用联合移植方法同时重建虎口和拇指８例。结果：皮瓣全部成活，平均经１５个月随访，疗效优２５例，良１７例，可２例。结论：指背和手背岛状皮瓣适合修复小面积指蹼缺损，骨间背侧动脉皮瓣是修复中等指蹼创面的较佳选择，脐旁皮瓣和股前外侧皮瓣能重建大面积和不规则指蹼缺损。本组经验显示，缝合皮神经的皮瓣疗效稍优，趾蹼皮瓣重建的指蹼综合效果最佳，联合移植能有效地一期再造拇指和指蹼。     

超选择动脉栓塞治疗血管搏动性耳鸣（附2例报告）

采用数字减影血管造影技术超选择性动脉栓塞治愈２例血管搏动怀耳鸣，并就发病原因、机理、治疗措施、临床特征进行讨论。     

PACS系统架构与数字化医院建设

目的探讨在构建图像归档和通讯系统(PACS)中系统构架的设计和实现以及利用PACS实现无胶片化运作的数字化医院.方法PACS系统建设可简单分为规划、实施和运行三个阶段.为了实现医院的无胶片化运作,通过对以下几个方面进行深入的讨论分析:规划阶段的系统结构、配置、功能和接口,实施阶段的工作流程和具体细节以及运行阶段的使用等,进而形成一个行之有效的PACS系统架构.结果基于以上对PACS系统架构的分析,在系统结构上采用前置工作站技术,在功能和接口上符合HL7和DICOM标准接口,在工作流程上遵循IHE体系结构,在运行阶段引入丰富的图像后处理功能,实现了一个有效的PACS系统架构.应用此架构,中山市小榄人民医院实现了彻底的无胶片化运作.结论PACS建设是一项复杂的系统工程,其中PACS系统架构是构建无胶片化运作的数字化医院的关键所在.实际应用结果表明,上述PACS系统架构对实现无胶片化运作的数字化医院是切实可行的.     

Agfa新一代数字X线成像系统DX-S在小儿胸片中的应用

目的：探讨Agfa新一代X线成像系统（DX-S）在儿童胸片应用中的临床价值。方法：选择年龄3-4岁，体重在12-15公斤患儿100名，将这100名患儿随机分成2组，分别使用市场上同级别品稗CR和Agfa DX-S进行胸部摄片．由放射科有经验的医师3名在双盲前提下对这100张胸片进行分析，评价胸部特定的8个解剖区域（周围肺实质、中心肺实质、肺门、心脏、横膈、上纵隔，骨骼和软组织），应用5分指标对所有100张胸片进行胸片质量分析比较，进行统计学分析。并对这100张胸片所用曝光条件千伏（KV），毫安秒（mAs）进行比较。结果 Agfa DX-S图像质量高于该品牌，更有利于诊断，同时Agfa DX-S使用的曝光条件明显低于市场上同类产品。结论：Agfa新一代数字X线成像系统DX-S值得在儿科放射领域推广应用。